kwadrat sumy przedstaw w postaci sumy
(1/2+5b) do potegi 2
(a+2b) do potegi 2
(3x+5y) do potegi 2
(4x + 2/3 y ) do potegi 2
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(1/2+5b) do potegi 2=1/4+5b+25b^2
(3x+5y) do potegi 2= 9x^2+ 30xy+25y^2
(4x + 2/3 y ) do potegi 2 = 16x^2+16/3xy+4/9y^2
^- do potęgi